U.S. Rep. Jesse Jackson Jr. is responding well to treatment for bipolar depression, the Mayo Clinic said Monday.

The Rochester, Minn.-based clinic said Jackson is regaining his strength but offered no further information on his condition.

In early July, the congressman's office announced he was "receiving intensive medical treatment at a residential treatment facility for a mood disorder." A few weeks later, his office said he was undergoing an "extensive inpatient evaluation for depression and gastrointestinal issues" at the Mayo Clinic.

Jackson's wife, Sandi, said earlier this month her husband had "good days and bad days" and doctors were increasing his depression medication to "therapeutic levels."